PURPORT

Adi-caturbuja, the original expansions from Baladeva, are Vasudeva, Saṅkarsana, Pradyumna and Aniruddha. All of Them are Visnu-tattvas or nondifferent Personalities of Godhead. In the incarnation of Sri Rama, all these different expansions appeared for particular pastimes. Lord Rama is the original Vasudeva, and His brothers were Saṅkarsana, Pradyumna and Aniruddha. Aniruddha is also the cause of Maha-Visnu, from whose breathing the Rg-veda appeared. All this is nicely explained in the Markandeya Purana. In the incarnation of Lord Krsna, Aniruddha appeared as the son of the Lord. Lord Krsna in Dvaraka is the Vasudeva expansion of the original group. The original Lord Krsna never leaves Goloka Vrndavana. All the plenary expansions are one and the same Visnu-tattva, and there is no difference in their potency.